Editor's copy of the series of lectures "Problems in many-language systems" for the International Summer School on Language Hierarchies and Interfaces (in English with notes made by Hoare, Koster, Gries and Wulf)

The author plans to leave the Carnegie-Mellon University and start a new software company.

telling that the time has come to discuss the most pressing matters of the IFIP Working Conference

with request to meet in the airport.

Request to send over additional material on BLISS language and to answer some questions

concerning important aspects of Ershov's and Pottosin's visit to the USA

Author asks whether A.P. Ershov can be a program committee member for the WG meeting in Novosibirsk.

of problems, give by colleagues

about holding the Working conference of WG 2.4.

Information on International Workshop on High-level Language Computer Architecture is provided and invitation to serve as a member of Program Committee is made.

The steps adressee should undertake with connection to possible change of the IFIP Working conference dates

The author thanks A.P.Ershov for his hospitality in Akademgorodok and would be delighted to have him visit the Carnegie-Mellon University. He also sends a copy of his book and asks for a copy of the thesis (presented by a Ershov's student) on the Pascal parser.

The author finds the behaviour of the USSR governement towards dissidents and Afghanistan as abhorent as other American scientists do, but feels that it is important to keep an open channel of communication between two countries. Nevertheless under present situation he came to the conclusion that it would be unwise for A.Ershov to place himself in an incomfortable position when visiting the Carnegie-Mellon University and thinks, should Ershov accept his previous invitation, it would be best to meet on personal ground only.